The Relative Weight of Temporal Envelope Cues in Different Frequency Regions for Mandarin Sentence Recognition
The Relative Weight of Temporal Envelope Cues in Different Frequency Regions for Mandarin Sentence Recognition
复制标题
普通话句子识别中不同频率区域时间包络线索的相对权重
DOI：
10.1155/2017/7416727
复制
发表时间：
2017-01-01
影响因子：
3.1
通讯作者：
Yin, Shankai
中科院分区：
文献类型：
--
作者：
Guo, Yang;Sun, Yuanyuan;Yin, Shankai
包含语音信息的声学时间包络 (E) 线索分布在整个频谱上。为了研究普通话句子识别中不同频率区域的 E 线索的相对权重，使用希尔伯特分解从 80–7,562Hz 范围内的 30 个连续频带中提取 E 信息，然后分配到五个频率区域。识别分数是通过来自 40 名正常听力听众的 1 或 2 个随机区域的声学 E 线索获得的。当仅提供来自一个区域的 E 信息时，识别分数范围为 8.2% 至 16.3%，而当提供来自两个频率区域的 E 信息时，识别分数范围为 57.9% 至 87.7%，这表明不同频率区域的时间 E 线索之间存在协同效应。接下来，使用最小二乘法计算五个频率区域的 E 信息对句子感知的相对贡献。结果表明，对于普通话这种声调语言，频率区域1（80-502赫兹）和区域3（1,022-1,913赫兹）的时间E线索对句子识别智能的贡献比其他区域更大，特别是包含基频（F0）信息的80-502赫兹区域。
Acoustic temporal envelope (E) cues containing speech information are distributed across the frequency spectrum. To investigate the relative weight of E cues in different frequency regions for Mandarin sentence recognition, E information was extracted from 30 contiguous bands across the range of 80–7,562 Hz using Hilbert decomposition and then allocated to five frequency regions. Recognition scores were obtained with acoustic E cues from 1 or 2 random regions from 40 normal-hearing listeners. While the recognition scores ranged from 8.2% to 16.3% when E information from only one region was available, the scores ranged from 57.9% to 87.7% when E information from two frequency regions was presented, suggesting a synergistic effect among the temporal E cues in different frequency regions. Next, the relative contributions of the E information from the five frequency regions to sentence perception were computed using a least-squares approach. The results demonstrated that, for Mandarin Chinese, a tonal language, the temporal E cues of Frequency Region 1 (80–502 Hz) and Region 3 (1,022–1,913 Hz) contributed more to the intelligence of sentence recognition than other regions, particularly the region of 80–502 Hz, which contained fundamental frequency (F0) information.